按下暂停键时笔记本电脑不会暂停，即使我输入
command systemctl suspend -i .
其中一个 USB 端口不工作，并且usb2-port3 over-current condition dmesg 出现消息。
- 操作系统：Ubuntu 20.04；
- 硬件：戴尔 Latitude
笔记本电脑在 Windows 10 模式（双启动）下成功进入睡眠状态。
以下是有关暂停的 journalctl 日志
May 30 01:34:27 user_abcd kernel: PM: suspend entry (deep)
May 30 01:34:33 user_abcd kernel: printk: Suspending console(s) (use no_console_suspend to debug)
May 30 01:34:33 user_abcd kernel: PM: dpm_run_callback(): usb_dev_suspend+0x0/0x20 returns -16
May 30 01:34:33 user_abcd kernel: PM: Device usb2 failed to suspend async: error -16
May 30 01:34:33 user_abcd kernel: PM: dpm_run_callback(): usb_dev_suspend+0x0/0x20 returns -16
May 30 01:34:33 user_abcd kernel: PM: Device usb1 failed to suspend async: error -16
May 30 01:34:33 user_abcd kernel: PM: Some devices failed to suspend, or early wake event detected
May 30 01:34:33 user_abcd kernel: PM: suspend exit
May 30 01:34:33 user_abcd kernel: PM: suspend entry (s2idle)
May 30 01:34:38 user_abcd kernel: printk: Suspending console(s) (use no_console_suspend to debug)
May 30 01:34:38 user_abcd kernel: PM: dpm_run_callback(): usb_dev_suspend+0x0/0x20 returns -16
May 30 01:34:38 user_abcd kernel: PM: Device usb2 failed to suspend async: error -16
May 30 01:34:38 user_abcd kernel: PM: dpm_run_callback(): usb_dev_suspend+0x0/0x20 returns -16
May 30 01:34:38 user_abcd kernel: PM: Device usb1 failed to suspend async: error -16
May 30 01:34:38 user_abcd kernel: PM: Some devices failed to suspend, or early wake event detected
May 30 01:34:39 user_abcd kernel: PM: suspend exit
May 30 01:34:38 user_abcd systemd-sleep[2322]: Failed to suspend system. System resumed again: Device or resource busy
May 30 01:34:39 user_abcd systemd[1]: systemd-suspend.service: Main process exited, code=exited, status=1/FAILURE
May 30 01:34:39 user_abcd systemd[1]: systemd-suspend.service: Failed with result 'exit-code'.
May 30 01:34:39 user_abcd systemd[1]: suspend.target: Job suspend.target/start failed with result 'dependency'.
lsusb 输出：
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 0cf3:e007 Qualcomm Atheros Communications
Bus 001 Device 003: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 002: ID 0bda:5769 Realtek Semiconductor Corp. Integrated_Webcam_HD
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub